package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.dao.OrderMapper;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.service.*;
import com.itheima.reggie.web.exception.CustomException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements IOrderService {
    @Autowired
    private IShoppingCartService shoppingCartService;

    @Autowired
    private IUserService userService;

    @Autowired
    private IAdressBookService addressBookService;

    @Autowired
    private IOrderDetailService orderDetailService;

    //用户下单呢
    @Override
    @Transactional
    public void submit(Orders orders) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //条件构造
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        //条件过滤，确定是登录用户在下单
        wrapper.eq(ShoppingCart::getUserId,userId);
        //查询当前用户的购物车数据  list
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(wrapper);
        //如果购物车内数据为空，不能下单，抛出异常 ?????
        if (shoppingCartList==null || shoppingCartList.size()==0){
            throw new CustomException("购物车为空，不能下单");
        }
        //根据用户id查询用户数据
        User user = userService.getById(userId);
        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        //如果地址为空，不能下单，抛出异常
        if (addressBook==null){
            throw new CustomException("地址有误，不能下单");
        }
        //获取订单号，IdWorker
        long orderId = IdWorker.getId();
        //新建一个对象????
        AtomicInteger atomicInteger = new AtomicInteger(0);
        //组装订单明细信息stream()
        List<OrderDetail> orderDetails =
                shoppingCartList.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);//订单号
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());//口味
            orderDetail.setDishId(item.getDishId());//菜品
            orderDetail.setSetmealId(item.getSetmealId());//套餐
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            //????
                    atomicInteger.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
                    return orderDetail;
        }).collect(Collectors.toList());
        //组装订单数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(atomicInteger.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);
        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);



    }

}